Some months ago a friend gave me a several year old but in good condition top of the line Fantastic vent fan assembly from a PU camper he once had. By top of the line, I mean one that included an adjustable thermostat and a reversing switch, along with the usual 3-speed fan switch. The one that came with my Class C new in 2006 was only the basic Fantastic vent fan with 3-speeds and always pulled air from the inside and expelled it out the vent.
I disassembled my Fantastic vent fan, modified it, and installed the controls into it from the older Fantastic vent fan assembly.
I hope I have now solved some problems we experienced on trips we took this year:
- By using my fan now in "IN" mode when camped so as to draw air in from over the roof and push it into the coach interior I get a positive pressure inside the rig. This should absolutely stop any generator fumes from entering the interior in order to provide more worry free carbon monoxide safety along with continual refreshing of the interior air during extended runs of the generator when boondocking for battery charging or in extreme heat in which the A/C is necessary.
- Also by using the fan as above in "IN" mode to improve interior positive pressure when traveling down dusty dirt/gravel roads, we should be able to keep dust out of the coach better than trying to use only the cab's dash system for pressurizing the whole motorhome's interior.
- We'll occasionally use the Fantactic vent fan's adjustable thermostat feature when boondocking to better control interior heat and ventilation in moderate weather with less draw on the batteries than that of a constantly running vent fan.
- We're also going to experiment with using our new upgraded vent fan in "IN" mode to push air out the stove hood vent when cooking to exhaust cooking fumes and moisture. This may allow us to leave the stove's vent fan off, as the stove's fan is louder, and uses more coach battery energy, than the Fantastic vent fan. I've already checked this and the Fantastic vent fan in "IN" mode does open the stove's exhaust fan exterior covering flap when running on any of it's 3 speeds.
2005 E450 Itasca 24V Class C